AppBarLayout.java revision df2d45b76203a9c4101629005eb27059d7f80297
1a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes/* 2a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Copyright (C) 2015 The Android Open Source Project 3a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 4a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Licensed under the Apache License, Version 2.0 (the "License"); 5a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * you may not use this file except in compliance with the License. 6a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * You may obtain a copy of the License at 7a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 8a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * http://www.apache.org/licenses/LICENSE-2.0 9a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 10a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Unless required by applicable law or agreed to in writing, software 11a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * distributed under the License is distributed on an "AS IS" BASIS, 12a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * See the License for the specific language governing permissions and 14a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * limitations under the License. 15a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 16a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 17a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banespackage android.support.design.widget; 18a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 198e10080c914d1ad0784394fa3026b85535535847Aurimas Liutikasimport static android.support.annotation.RestrictTo.Scope.LIBRARY_GROUP; 208e10080c914d1ad0784394fa3026b85535535847Aurimas Liutikasimport static android.support.design.widget.ViewUtils.objectEquals; 218e10080c914d1ad0784394fa3026b85535535847Aurimas Liutikas 228f886fe8c7e23fe6ccb8734167c960c2ed3429c3Alan Viveretteimport android.annotation.TargetApi; 23a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.content.Context; 24a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.content.res.TypedArray; 2500a00a7d3ba8279294f63994473afc32e05dcf10Chris Banesimport android.graphics.Rect; 261a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banesimport android.os.Build; 27e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banesimport android.os.Parcel; 28e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banesimport android.os.Parcelable; 2950dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banesimport android.support.annotation.IntDef; 3072a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banesimport android.support.annotation.NonNull; 3172a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banesimport android.support.annotation.Nullable; 328f886fe8c7e23fe6ccb8734167c960c2ed3429c3Alan Viveretteimport android.support.annotation.RequiresApi; 33c39d9c75590eca86a5e7e32a8824ba04a0d42e9bAlan Viveretteimport android.support.annotation.RestrictTo; 3413633353237d6506f4c436b459bc8be8c3d7ed68Chris Banesimport android.support.annotation.VisibleForTesting; 35a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.support.design.R; 3662ab25d71ccfa775a8bd2add7b41277bc4e14bbcChris Banesimport android.support.v4.os.ParcelableCompat; 3762ab25d71ccfa775a8bd2add7b41277bc4e14bbcChris Banesimport android.support.v4.os.ParcelableCompatCreatorCallbacks; 3805f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banesimport android.support.v4.view.AbsSavedState; 39a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.support.v4.view.ViewCompat; 406ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banesimport android.support.v4.view.WindowInsetsCompat; 41a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.util.AttributeSet; 42a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.view.View; 43a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.view.ViewGroup; 44a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.view.animation.Interpolator; 45a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.widget.LinearLayout; 46a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 4750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banesimport java.lang.annotation.Retention; 4850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banesimport java.lang.annotation.RetentionPolicy; 49d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banesimport java.lang.ref.WeakReference; 50631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banesimport java.util.ArrayList; 51a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport java.util.List; 52a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 53a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes/** 54a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * AppBarLayout is a vertical {@link LinearLayout} which implements many of the features of 559fb154338a62edc2c57dc036895199d6f1769400Chris Banes * material designs app bar concept, namely scrolling gestures. 56a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <p> 57a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Children should provide their desired scrolling behavior through 58a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * {@link LayoutParams#setScrollFlags(int)} and the associated layout xml attribute: 59a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * {@code app:layout_scrollFlags}. 60a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 61a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <p> 62a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * This view depends heavily on being used as a direct child within a {@link CoordinatorLayout}. 63a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * If you use AppBarLayout within a different {@link ViewGroup}, most of it's functionality will 64a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * not work. 65a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <p> 669fb154338a62edc2c57dc036895199d6f1769400Chris Banes * AppBarLayout also requires a separate scrolling sibling in order to know when to scroll. 679fb154338a62edc2c57dc036895199d6f1769400Chris Banes * The binding is done through the {@link ScrollingViewBehavior} behavior class, meaning that you 689fb154338a62edc2c57dc036895199d6f1769400Chris Banes * should set your scrolling view's behavior to be an instance of {@link ScrollingViewBehavior}. 699fb154338a62edc2c57dc036895199d6f1769400Chris Banes * A string resource containing the full class name is available. 70a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 71a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <pre> 72a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <android.support.design.widget.CoordinatorLayout 73a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * xmlns:android="http://schemas.android.com/apk/res/android" 74a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * xmlns:app="http://schemas.android.com/apk/res-auto" 75a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * android:layout_width="match_parent" 76a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * android:layout_height="match_parent"> 77a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 78a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <android.support.v4.widget.NestedScrollView 79a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * android:layout_width="match_parent" 80a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * android:layout_height="match_parent" 81a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * app:layout_behavior="@string/appbar_scrolling_view_behavior"> 82a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 83a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <!-- Your scrolling content --> 84a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 85a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * </android.support.v4.widget.NestedScrollView> 86a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 87a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <android.support.design.widget.AppBarLayout 88a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * android:layout_height="wrap_content" 89a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * android:layout_width="match_parent"> 90a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 91a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <android.support.v7.widget.Toolbar 92a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * ... 93a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * app:layout_scrollFlags="scroll|enterAlways"/> 94a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 95a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <android.support.design.widget.TabLayout 96a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * ... 97a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * app:layout_scrollFlags="scroll|enterAlways"/> 98a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 99a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * </android.support.design.widget.AppBarLayout> 100a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 101a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * </android.support.design.widget.CoordinatorLayout> 102a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * </pre> 103a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 104a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see <a href="http://www.google.com/design/spec/layout/structure.html#structure-app-bar"> 105a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * http://www.google.com/design/spec/layout/structure.html#structure-app-bar</a> 106a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 107a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes@CoordinatorLayout.DefaultBehavior(AppBarLayout.Behavior.class) 108a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banespublic class AppBarLayout extends LinearLayout { 109a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 110657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas static final int PENDING_ACTION_NONE = 0x0; 111657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas static final int PENDING_ACTION_EXPANDED = 0x1; 112657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas static final int PENDING_ACTION_COLLAPSED = 0x2; 113657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas static final int PENDING_ACTION_ANIMATE_ENABLED = 0x4; 1149995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes 115a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 116631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * Interface definition for a callback to be invoked when an {@link AppBarLayout}'s vertical 117631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * offset changes. 118a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 119631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public interface OnOffsetChangedListener { 120a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 121a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Called when the {@link AppBarLayout}'s layout offset has been changed. This allows 122a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * child views to implement custom behavior based on the offset (for instance pinning a 123a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * view at a certain y value). 124a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 125631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * @param appBarLayout the {@link AppBarLayout} which offset has changed 12650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes * @param verticalOffset the vertical offset for the parent {@link AppBarLayout}, in px 127a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 128631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset); 129a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 130a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 131a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes private static final int INVALID_SCROLL_RANGE = -1; 132a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 133a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes private int mTotalScrollRange = INVALID_SCROLL_RANGE; 134a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes private int mDownPreScrollRange = INVALID_SCROLL_RANGE; 135a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes private int mDownScrollRange = INVALID_SCROLL_RANGE; 136a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1371a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes private boolean mHaveChildWithInterpolator; 13850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 1399995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes private int mPendingAction = PENDING_ACTION_NONE; 1409995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes 1416ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes private WindowInsetsCompat mLastInsets; 1426ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes 1431a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes private List<OnOffsetChangedListener> mListeners; 1441a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 1451a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes private boolean mCollapsible; 1461a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes private boolean mCollapsed; 1471a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 1481a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes private final int[] mTmpStatesArray = new int[2]; 149631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 150a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public AppBarLayout(Context context) { 151a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes this(context, null); 152a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 153a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 154a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public AppBarLayout(Context context, AttributeSet attrs) { 155a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(context, attrs); 156a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes setOrientation(VERTICAL); 15750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 158809bb62055ad42b88f3a69308be222801b89fbd9Chris Banes ThemeUtils.checkAppCompatTheme(context); 159809bb62055ad42b88f3a69308be222801b89fbd9Chris Banes 1601a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes if (Build.VERSION.SDK_INT >= 21) { 1611a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes // Use the bounds view outline provider so that we cast a shadow, even without a 1621a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes // background 1631a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes ViewUtilsLollipop.setBoundsViewOutlineProvider(this); 1641a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 1651a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes // If we're running on API 21+, we should reset any state list animator from our 1661a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes // default style 1671a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes ViewUtilsLollipop.setStateListAnimatorFromAttrs(this, attrs, 0, 1681a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes R.style.Widget_Design_AppBarLayout); 1691a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 1701a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 1711a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.AppBarLayout, 17250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 0, R.style.Widget_Design_AppBarLayout); 17347082c30c630c34829439a9eecd1cf7e8d255a86Aurimas Liutikas ViewCompat.setBackground(this, a.getDrawable(R.styleable.AppBarLayout_android_background)); 1749995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes if (a.hasValue(R.styleable.AppBarLayout_expanded)) { 1759995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes setExpanded(a.getBoolean(R.styleable.AppBarLayout_expanded, false)); 1769995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 1771a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes if (Build.VERSION.SDK_INT >= 21 && a.hasValue(R.styleable.AppBarLayout_elevation)) { 1781a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes ViewUtilsLollipop.setDefaultAppBarLayoutStateListAnimator( 1791a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes this, a.getDimensionPixelSize(R.styleable.AppBarLayout_elevation, 0)); 1801a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 18150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes a.recycle(); 18250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 1836ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes ViewCompat.setOnApplyWindowInsetsListener(this, 1846ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes new android.support.v4.view.OnApplyWindowInsetsListener() { 1856ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes @Override 1866ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes public WindowInsetsCompat onApplyWindowInsets(View v, 1876ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes WindowInsetsCompat insets) { 1888818e8e12682e5df1535cd9b2d792494bd3e059dChris Banes return onWindowInsetChanged(insets); 1896ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes } 1906ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes }); 191631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 192631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 193631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes /** 194631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * Add a listener that will be called when the offset of this {@link AppBarLayout} changes. 195631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * 196631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * @param listener The listener that will be called when the offset changes.] 197631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * 198631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * @see #removeOnOffsetChangedListener(OnOffsetChangedListener) 199631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes */ 200631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public void addOnOffsetChangedListener(OnOffsetChangedListener listener) { 2011a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes if (mListeners == null) { 2021a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes mListeners = new ArrayList<>(); 2031a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 2046f730c0acfb10a929172ea2981a1aded0e39f5c7Chris Banes if (listener != null && !mListeners.contains(listener)) { 2056f730c0acfb10a929172ea2981a1aded0e39f5c7Chris Banes mListeners.add(listener); 206631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 207631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 208631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 209631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes /** 210631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * Remove the previously added {@link OnOffsetChangedListener}. 211631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * 212631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * @param listener the listener to remove. 213631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes */ 214631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public void removeOnOffsetChangedListener(OnOffsetChangedListener listener) { 2151a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes if (mListeners != null && listener != null) { 2166f730c0acfb10a929172ea2981a1aded0e39f5c7Chris Banes mListeners.remove(listener); 217631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 218a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 219a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 220a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 221ea004a01f44aaf36212120c936952c1742d03d30Chris Banes protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 222ea004a01f44aaf36212120c936952c1742d03d30Chris Banes super.onMeasure(widthMeasureSpec, heightMeasureSpec); 223ea004a01f44aaf36212120c936952c1742d03d30Chris Banes invalidateScrollRanges(); 224ea004a01f44aaf36212120c936952c1742d03d30Chris Banes } 225ea004a01f44aaf36212120c936952c1742d03d30Chris Banes 226ea004a01f44aaf36212120c936952c1742d03d30Chris Banes @Override 227a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes protected void onLayout(boolean changed, int l, int t, int r, int b) { 228a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super.onLayout(changed, l, t, r, b); 22979aa418487cdefb85d3c1fac32d6403a1ac6057dChris Banes invalidateScrollRanges(); 230a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 231a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mHaveChildWithInterpolator = false; 232a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes for (int i = 0, z = getChildCount(); i < z; i++) { 233a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final View child = getChildAt(i); 234a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final LayoutParams childLp = (LayoutParams) child.getLayoutParams(); 235a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final Interpolator interpolator = childLp.getScrollInterpolator(); 236a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 237a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (interpolator != null) { 238a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mHaveChildWithInterpolator = true; 239a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes break; 240a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 241a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 2421a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 2431a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes updateCollapsible(); 2441a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 2451a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 2461a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes private void updateCollapsible() { 2471a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes boolean haveCollapsibleChild = false; 2481a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes for (int i = 0, z = getChildCount(); i < z; i++) { 2491a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes if (((LayoutParams) getChildAt(i).getLayoutParams()).isCollapsible()) { 2501a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes haveCollapsibleChild = true; 2511a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes break; 2521a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 2531a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 25457aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes setCollapsibleState(haveCollapsibleChild); 255a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 256a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 257ea004a01f44aaf36212120c936952c1742d03d30Chris Banes private void invalidateScrollRanges() { 258ea004a01f44aaf36212120c936952c1742d03d30Chris Banes // Invalidate the scroll ranges 259ea004a01f44aaf36212120c936952c1742d03d30Chris Banes mTotalScrollRange = INVALID_SCROLL_RANGE; 260ea004a01f44aaf36212120c936952c1742d03d30Chris Banes mDownPreScrollRange = INVALID_SCROLL_RANGE; 261ea004a01f44aaf36212120c936952c1742d03d30Chris Banes mDownScrollRange = INVALID_SCROLL_RANGE; 262ea004a01f44aaf36212120c936952c1742d03d30Chris Banes } 263ea004a01f44aaf36212120c936952c1742d03d30Chris Banes 264a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 265a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public void setOrientation(int orientation) { 266a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (orientation != VERTICAL) { 267a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes throw new IllegalArgumentException("AppBarLayout is always vertical and does" 268a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes + " not support horizontal orientation"); 269a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 270a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super.setOrientation(orientation); 271a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 272a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 2739995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes /** 2749995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * Sets whether this {@link AppBarLayout} is expanded or not, animating if it has already 2759995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * been laid out. 2769995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * 2779995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * <p>As with {@link AppBarLayout}'s scrolling, this method relies on this layout being a 2789995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * direct child of a {@link CoordinatorLayout}.</p> 2799995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * 2809995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * @param expanded true if the layout should be fully expanded, false if it should 2819995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * be fully collapsed 2829995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * 2839995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * @attr ref android.support.design.R.styleable#AppBarLayout_expanded 2849995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes */ 2859995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes public void setExpanded(boolean expanded) { 2869995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes setExpanded(expanded, ViewCompat.isLaidOut(this)); 2879995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 2889995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes 2899995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes /** 2909995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * Sets whether this {@link AppBarLayout} is expanded or not. 2919995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * 2929995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * <p>As with {@link AppBarLayout}'s scrolling, this method relies on this layout being a 2939995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * direct child of a {@link CoordinatorLayout}.</p> 2949995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * 2959995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * @param expanded true if the layout should be fully expanded, false if it should 2969995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * be fully collapsed 2979995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * @param animate Whether to animate to the new state 2989995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * 2999995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * @attr ref android.support.design.R.styleable#AppBarLayout_expanded 3009995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes */ 3019995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes public void setExpanded(boolean expanded, boolean animate) { 3029995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes mPendingAction = (expanded ? PENDING_ACTION_EXPANDED : PENDING_ACTION_COLLAPSED) 3039995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes | (animate ? PENDING_ACTION_ANIMATE_ENABLED : 0); 3049995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes requestLayout(); 3059995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 3069995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes 307a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 308a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { 309a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return p instanceof LayoutParams; 310a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 311a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 312a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 313a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes protected LayoutParams generateDefaultLayoutParams() { 314a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT); 315a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 316a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 317a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 318a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams generateLayoutParams(AttributeSet attrs) { 319a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return new LayoutParams(getContext(), attrs); 320a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 321a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 322a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 323a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes protected LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { 3248f886fe8c7e23fe6ccb8734167c960c2ed3429c3Alan Viverette if (Build.VERSION.SDK_INT >= 19 && p instanceof LinearLayout.LayoutParams) { 325a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return new LayoutParams((LinearLayout.LayoutParams) p); 326a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } else if (p instanceof MarginLayoutParams) { 327a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return new LayoutParams((MarginLayoutParams) p); 328a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 329a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return new LayoutParams(p); 330a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 331a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 332657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas boolean hasChildWithInterpolator() { 333a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mHaveChildWithInterpolator; 334a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 335a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 336a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 3376ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes * Returns the scroll range of all children. 338a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 339a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @return the scroll range in px 340a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 3416ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes public final int getTotalScrollRange() { 342a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (mTotalScrollRange != INVALID_SCROLL_RANGE) { 343a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mTotalScrollRange; 344a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 345a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 346a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int range = 0; 347a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes for (int i = 0, z = getChildCount(); i < z; i++) { 348a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final View child = getChildAt(i); 349a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 350ea004a01f44aaf36212120c936952c1742d03d30Chris Banes final int childHeight = child.getMeasuredHeight(); 351a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int flags = lp.mScrollFlags; 352a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 353a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if ((flags & LayoutParams.SCROLL_FLAG_SCROLL) != 0) { 354a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // We're set to scroll so add the child's height 355b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes range += childHeight + lp.topMargin + lp.bottomMargin; 356a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 357a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if ((flags & LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED) != 0) { 358a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // For a collapsing scroll, we to take the collapsed height into account. 3596ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes // We also break straight away since later views can't scroll beneath 360a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // us 3616ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes range -= ViewCompat.getMinimumHeight(child); 3626ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes break; 363a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 364a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } else { 365a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // As soon as a view doesn't have the scroll flag, we end the range calculation. 366a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // This is because views below can not scroll under a fixed view. 367a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes break; 368a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 369a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 3704832063daa6620f0ad51c4a16f31502dab1adc89Chris Banes return mTotalScrollRange = Math.max(0, range - getTopInset()); 371a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 372a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 373657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas boolean hasScrollableChildren() { 374a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return getTotalScrollRange() != 0; 375a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 376a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 377a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 378a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Return the scroll range when scrolling up from a nested pre-scroll. 379a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 380657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas int getUpNestedPreScrollRange() { 38150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes return getTotalScrollRange(); 382a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 383a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 384a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 385a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Return the scroll range when scrolling down from a nested pre-scroll. 386a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 387657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas int getDownNestedPreScrollRange() { 388a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (mDownPreScrollRange != INVALID_SCROLL_RANGE) { 389a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // If we already have a valid value, return it 390a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mDownPreScrollRange; 391a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 392a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 393a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int range = 0; 394a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes for (int i = getChildCount() - 1; i >= 0; i--) { 395a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final View child = getChildAt(i); 396a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 397ea004a01f44aaf36212120c936952c1742d03d30Chris Banes final int childHeight = child.getMeasuredHeight(); 398a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int flags = lp.mScrollFlags; 399a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 400a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if ((flags & LayoutParams.FLAG_QUICK_RETURN) == LayoutParams.FLAG_QUICK_RETURN) { 401b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes // First take the margin into account 402b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes range += lp.topMargin + lp.bottomMargin; 403a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // The view has the quick return flag combination... 404a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if ((flags & LayoutParams.SCROLL_FLAG_ENTER_ALWAYS_COLLAPSED) != 0) { 405a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // If they're set to enter collapsed, use the minimum height 406a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes range += ViewCompat.getMinimumHeight(child); 40747543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes } else if ((flags & LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED) != 0) { 40847543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes // Only enter by the amount of the collapsed height 40947543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes range += childHeight - ViewCompat.getMinimumHeight(child); 410a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } else { 411a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // Else use the full height 412a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes range += childHeight; 413a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 414a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } else if (range > 0) { 415a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // If we've hit an non-quick return scrollable view, and we've already hit a 416a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // quick return view, return now 417a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes break; 418a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 419a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 42013633353237d6506f4c436b459bc8be8c3d7ed68Chris Banes return mDownPreScrollRange = Math.max(0, range); 421a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 422a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 423a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 424a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Return the scroll range when scrolling down from a nested scroll. 425a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 426657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas int getDownNestedScrollRange() { 427a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (mDownScrollRange != INVALID_SCROLL_RANGE) { 428a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // If we already have a valid value, return it 429a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mDownScrollRange; 430a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 431a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 432a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int range = 0; 433c1ce4f6cf4d99d6856c4259bf1bb1cb56f604737Chris Banes for (int i = 0, z = getChildCount(); i < z; i++) { 434a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final View child = getChildAt(i); 435a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 436ea004a01f44aaf36212120c936952c1742d03d30Chris Banes int childHeight = child.getMeasuredHeight(); 437b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes childHeight += lp.topMargin + lp.bottomMargin; 438a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 439a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int flags = lp.mScrollFlags; 440a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 441a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if ((flags & LayoutParams.SCROLL_FLAG_SCROLL) != 0) { 442a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // We're set to scroll so add the child's height 443a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes range += childHeight; 444a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 445a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if ((flags & LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED) != 0) { 446a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // For a collapsing exit scroll, we to take the collapsed height into account. 4474832063daa6620f0ad51c4a16f31502dab1adc89Chris Banes // We also break the range straight away since later views can't scroll 448a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // beneath us 4494832063daa6620f0ad51c4a16f31502dab1adc89Chris Banes range -= ViewCompat.getMinimumHeight(child) + getTopInset(); 4504832063daa6620f0ad51c4a16f31502dab1adc89Chris Banes break; 451a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 452a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } else { 453a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // As soon as a view doesn't have the scroll flag, we end the range calculation. 454a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // This is because views below can not scroll under a fixed view. 455a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes break; 456a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 457a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 4584c33be829067714342b629d29329206bc2116afeChris Banes return mDownScrollRange = Math.max(0, range); 459a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 460a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 461657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas void dispatchOffsetUpdates(int offset) { 4621a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes // Iterate backwards through the list so that most recently added listeners 4631a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes // get the first chance to decide 4641a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes if (mListeners != null) { 4651a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes for (int i = 0, z = mListeners.size(); i < z; i++) { 4661a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes final OnOffsetChangedListener listener = mListeners.get(i); 4671a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes if (listener != null) { 4681a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes listener.onOffsetChanged(this, offset); 4691a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 4701a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 4711a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 4721a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 4731a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 47450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes final int getMinimumHeightForVisibleOverlappingContent() { 47517ed3263761329f6aa6796941358c41001fff325Chris Banes final int topInset = getTopInset(); 47650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes final int minHeight = ViewCompat.getMinimumHeight(this); 47750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if (minHeight != 0) { 47850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // If this layout has a min height, use it (doubled) 4796ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes return (minHeight * 2) + topInset; 48050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 48150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 48250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // Otherwise, we'll use twice the min height of our last child 48350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes final int childCount = getChildCount(); 484b75a16fb6433ab27973d419d23ed1286c073fca8Chris Banes final int lastChildMinHeight = childCount >= 1 485b75a16fb6433ab27973d419d23ed1286c073fca8Chris Banes ? ViewCompat.getMinimumHeight(getChildAt(childCount - 1)) : 0; 486b75a16fb6433ab27973d419d23ed1286c073fca8Chris Banes if (lastChildMinHeight != 0) { 487b75a16fb6433ab27973d419d23ed1286c073fca8Chris Banes return (lastChildMinHeight * 2) + topInset; 488b75a16fb6433ab27973d419d23ed1286c073fca8Chris Banes } 489b75a16fb6433ab27973d419d23ed1286c073fca8Chris Banes 490b75a16fb6433ab27973d419d23ed1286c073fca8Chris Banes // If we reach here then we don't have a min height explicitly set. Instead we'll take a 491b75a16fb6433ab27973d419d23ed1286c073fca8Chris Banes // guess at 1/3 of our height being visible 492b75a16fb6433ab27973d419d23ed1286c073fca8Chris Banes return getHeight() / 3; 49350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 49450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 4951a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes @Override 4961a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes protected int[] onCreateDrawableState(int extraSpace) { 4971a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes final int[] extraStates = mTmpStatesArray; 4981a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes final int[] states = super.onCreateDrawableState(extraSpace + extraStates.length); 4991a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 5001a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes extraStates[0] = mCollapsible ? R.attr.state_collapsible : -R.attr.state_collapsible; 5011a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes extraStates[1] = mCollapsible && mCollapsed 5021a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes ? R.attr.state_collapsed : -R.attr.state_collapsed; 5031a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 5041a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes return mergeDrawableStates(states, extraStates); 5051a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 5061a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 507c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes /** 508c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes * Sets whether the AppBarLayout has collapsible children or not. 509c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes * 510c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes * @return true if the collapsible state changed 511c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes */ 512c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes private boolean setCollapsibleState(boolean collapsible) { 5131a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes if (mCollapsible != collapsible) { 5141a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes mCollapsible = collapsible; 5151a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes refreshDrawableState(); 516c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes return true; 5171a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 518c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes return false; 5191a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 5201a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 521c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes /** 522c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes * Sets whether the AppBarLayout is in a collapsed state or not. 523c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes * 524c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes * @return true if the collapsed state changed 525c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes */ 526657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas boolean setCollapsedState(boolean collapsed) { 5271a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes if (mCollapsed != collapsed) { 5281a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes mCollapsed = collapsed; 5291a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes refreshDrawableState(); 530c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes return true; 5311a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 532c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes return false; 5331a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 5341a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 53550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes /** 5361a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes * @deprecated target elevation is now deprecated. AppBarLayout's elevation is now 537926cd28257536b1206934d69585a2dab100147d5Chris Banes * controlled via a {@link android.animation.StateListAnimator}. If a target 538c9a859537b0871f84afeeb706a5b425fe3f2b4ddAurimas Liutikas * elevation is set, either by this method or the {@code app:elevation} attribute, 539926cd28257536b1206934d69585a2dab100147d5Chris Banes * a new state list animator is created which uses the given {@code elevation} value. 540631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * 5411a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes * @attr ref android.support.design.R.styleable#AppBarLayout_elevation 54250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes */ 5431a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes @Deprecated 544631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public void setTargetElevation(float elevation) { 5451a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes if (Build.VERSION.SDK_INT >= 21) { 5461a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes ViewUtilsLollipop.setDefaultAppBarLayoutStateListAnimator(this, elevation); 5471a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 548631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 549631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 550631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes /** 5511a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes * @deprecated target elevation is now deprecated. AppBarLayout's elevation is now 552926cd28257536b1206934d69585a2dab100147d5Chris Banes * controlled via a {@link android.animation.StateListAnimator}. This method now 553926cd28257536b1206934d69585a2dab100147d5Chris Banes * always returns 0. 554631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes */ 5551a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes @Deprecated 556631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public float getTargetElevation() { 5571a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes return 0; 55850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 55950dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 560657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas int getPendingAction() { 5619995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes return mPendingAction; 5629995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 5639995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes 564657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas void resetPendingAction() { 5659995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes mPendingAction = PENDING_ACTION_NONE; 5669995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 5679995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes 56813633353237d6506f4c436b459bc8be8c3d7ed68Chris Banes @VisibleForTesting 56913633353237d6506f4c436b459bc8be8c3d7ed68Chris Banes final int getTopInset() { 570ea004a01f44aaf36212120c936952c1742d03d30Chris Banes return mLastInsets != null ? mLastInsets.getSystemWindowInsetTop() : 0; 571ea004a01f44aaf36212120c936952c1742d03d30Chris Banes } 572ea004a01f44aaf36212120c936952c1742d03d30Chris Banes 573657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas WindowInsetsCompat onWindowInsetChanged(final WindowInsetsCompat insets) { 5748818e8e12682e5df1535cd9b2d792494bd3e059dChris Banes WindowInsetsCompat newInsets = null; 5758818e8e12682e5df1535cd9b2d792494bd3e059dChris Banes 5768818e8e12682e5df1535cd9b2d792494bd3e059dChris Banes if (ViewCompat.getFitsSystemWindows(this)) { 5778818e8e12682e5df1535cd9b2d792494bd3e059dChris Banes // If we're set to fit system windows, keep the insets 5788818e8e12682e5df1535cd9b2d792494bd3e059dChris Banes newInsets = insets; 5798818e8e12682e5df1535cd9b2d792494bd3e059dChris Banes } 5808818e8e12682e5df1535cd9b2d792494bd3e059dChris Banes 5818818e8e12682e5df1535cd9b2d792494bd3e059dChris Banes // If our insets have changed, keep them and invalidate the scroll ranges... 58219a80415a88ecfae6bbc645cd14b653ed4337648Chris Banes if (!objectEquals(mLastInsets, newInsets)) { 5838818e8e12682e5df1535cd9b2d792494bd3e059dChris Banes mLastInsets = newInsets; 5848818e8e12682e5df1535cd9b2d792494bd3e059dChris Banes invalidateScrollRanges(); 5858818e8e12682e5df1535cd9b2d792494bd3e059dChris Banes } 5868818e8e12682e5df1535cd9b2d792494bd3e059dChris Banes 58717ed3263761329f6aa6796941358c41001fff325Chris Banes return insets; 5886ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes } 5896ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes 590a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public static class LayoutParams extends LinearLayout.LayoutParams { 59150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 59250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes /** @hide */ 5938e10080c914d1ad0784394fa3026b85535535847Aurimas Liutikas @RestrictTo(LIBRARY_GROUP) 59450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes @IntDef(flag=true, value={ 59550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes SCROLL_FLAG_SCROLL, 59650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes SCROLL_FLAG_EXIT_UNTIL_COLLAPSED, 59750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes SCROLL_FLAG_ENTER_ALWAYS, 598bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes SCROLL_FLAG_ENTER_ALWAYS_COLLAPSED, 599bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes SCROLL_FLAG_SNAP 60050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes }) 60150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes @Retention(RetentionPolicy.SOURCE) 60250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes public @interface ScrollFlags {} 60350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 604a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 605a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * The view will be scroll in direct relation to scroll events. This flag needs to be 606a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * set for any of the other flags to take effect. If any sibling views 607a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * before this one do not have this flag, then this value has no effect. 608a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 609a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public static final int SCROLL_FLAG_SCROLL = 0x1; 610a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 611a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 612a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * When exiting (scrolling off screen) the view will be scrolled until it is 613a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 'collapsed'. The collapsed height is defined by the view's minimum height. 614a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 615a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see ViewCompat#getMinimumHeight(View) 616a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see View#setMinimumHeight(int) 617a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 618a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public static final int SCROLL_FLAG_EXIT_UNTIL_COLLAPSED = 0x2; 619a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 620a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 621a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * When entering (scrolling on screen) the view will scroll on any downwards 622a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * scroll event, regardless of whether the scrolling view is also scrolling. This 623a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * is commonly referred to as the 'quick return' pattern. 624a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 625a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public static final int SCROLL_FLAG_ENTER_ALWAYS = 0x4; 626a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 627a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 628a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * An additional flag for 'enterAlways' which modifies the returning view to 629a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * only initially scroll back to it's collapsed height. Once the scrolling view has 630a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * reached the end of it's scroll range, the remainder of this view will be scrolled 631a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * into view. The collapsed height is defined by the view's minimum height. 632a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 633a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see ViewCompat#getMinimumHeight(View) 634a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see View#setMinimumHeight(int) 635a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 636a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public static final int SCROLL_FLAG_ENTER_ALWAYS_COLLAPSED = 0x8; 637a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 638a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 639bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes * Upon a scroll ending, if the view is only partially visible then it will be snapped 640bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes * and scrolled to it's closest edge. For example, if the view only has it's bottom 25% 641bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes * displayed, it will be scrolled off screen completely. Conversely, if it's bottom 75% 642bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes * is visible then it will be scrolled fully into view. 643bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes */ 644bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes public static final int SCROLL_FLAG_SNAP = 0x10; 645bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes 646bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes /** 647bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes * Internal flags which allows quick checking features 648a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 649a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes static final int FLAG_QUICK_RETURN = SCROLL_FLAG_SCROLL | SCROLL_FLAG_ENTER_ALWAYS; 650bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes static final int FLAG_SNAP = SCROLL_FLAG_SCROLL | SCROLL_FLAG_SNAP; 6511a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes static final int COLLAPSIBLE_FLAGS = SCROLL_FLAG_EXIT_UNTIL_COLLAPSED 6521a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes | SCROLL_FLAG_ENTER_ALWAYS_COLLAPSED; 653a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 654a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int mScrollFlags = SCROLL_FLAG_SCROLL; 655a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes Interpolator mScrollInterpolator; 656a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 657a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams(Context c, AttributeSet attrs) { 658a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(c, attrs); 659c6cbbb50a06ec08e6888bd1c3dfd7fdf588d9db5Chris Banes TypedArray a = c.obtainStyledAttributes(attrs, R.styleable.AppBarLayout_Layout); 660c6cbbb50a06ec08e6888bd1c3dfd7fdf588d9db5Chris Banes mScrollFlags = a.getInt(R.styleable.AppBarLayout_Layout_layout_scrollFlags, 0); 661c6cbbb50a06ec08e6888bd1c3dfd7fdf588d9db5Chris Banes if (a.hasValue(R.styleable.AppBarLayout_Layout_layout_scrollInterpolator)) { 662a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int resId = a.getResourceId( 663c6cbbb50a06ec08e6888bd1c3dfd7fdf588d9db5Chris Banes R.styleable.AppBarLayout_Layout_layout_scrollInterpolator, 0); 664a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mScrollInterpolator = android.view.animation.AnimationUtils.loadInterpolator( 665a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes c, resId); 666a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 667a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes a.recycle(); 668a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 669a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 670a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams(int width, int height) { 671a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(width, height); 672a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 673a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 674a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams(int width, int height, float weight) { 675a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(width, height, weight); 676a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 677a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 678a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams(ViewGroup.LayoutParams p) { 679a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(p); 680a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 681a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 682a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams(MarginLayoutParams source) { 683a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(source); 684a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 685a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 6868f886fe8c7e23fe6ccb8734167c960c2ed3429c3Alan Viverette @RequiresApi(19) 6878f886fe8c7e23fe6ccb8734167c960c2ed3429c3Alan Viverette @TargetApi(19) 688a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams(LinearLayout.LayoutParams source) { 6898f886fe8c7e23fe6ccb8734167c960c2ed3429c3Alan Viverette // The copy constructor called here only exists on API 19+. 690a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(source); 691a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 692a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 6938f886fe8c7e23fe6ccb8734167c960c2ed3429c3Alan Viverette @RequiresApi(19) 6948f886fe8c7e23fe6ccb8734167c960c2ed3429c3Alan Viverette @TargetApi(19) 695a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams(LayoutParams source) { 6968f886fe8c7e23fe6ccb8734167c960c2ed3429c3Alan Viverette // The copy constructor called here only exists on API 19+. 697a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(source); 698a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mScrollFlags = source.mScrollFlags; 699a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mScrollInterpolator = source.mScrollInterpolator; 700a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 701a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 702a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 703a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Set the scrolling flags. 704a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 705a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @param flags bitwise int of {@link #SCROLL_FLAG_SCROLL}, 706bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes * {@link #SCROLL_FLAG_EXIT_UNTIL_COLLAPSED}, {@link #SCROLL_FLAG_ENTER_ALWAYS}, 707bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes * {@link #SCROLL_FLAG_ENTER_ALWAYS_COLLAPSED} and {@link #SCROLL_FLAG_SNAP }. 708a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 709a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see #getScrollFlags() 710a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 71173e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#AppBarLayout_Layout_layout_scrollFlags 712a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 71350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes public void setScrollFlags(@ScrollFlags int flags) { 714a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mScrollFlags = flags; 715a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 716a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 717a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 718a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Returns the scrolling flags. 719a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 720a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see #setScrollFlags(int) 721a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 72273e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#AppBarLayout_Layout_layout_scrollFlags 723a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 72450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes @ScrollFlags 725a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public int getScrollFlags() { 726a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mScrollFlags; 727a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 728a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 729a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 730a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Set the interpolator to when scrolling the view associated with this 731a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * {@link LayoutParams}. 732a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 733a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @param interpolator the interpolator to use, or null to use normal 1-to-1 scrolling. 734a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 73573e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#AppBarLayout_Layout_layout_scrollInterpolator 736a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see #getScrollInterpolator() 737a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 738a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public void setScrollInterpolator(Interpolator interpolator) { 739a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mScrollInterpolator = interpolator; 740a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 741a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 742a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 743a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Returns the {@link Interpolator} being used for scrolling the view associated with this 744a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * {@link LayoutParams}. Null indicates 'normal' 1-to-1 scrolling. 745a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 74673e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#AppBarLayout_Layout_layout_scrollInterpolator 747a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see #setScrollInterpolator(Interpolator) 748a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 749a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public Interpolator getScrollInterpolator() { 750a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mScrollInterpolator; 751a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 7521a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 7531a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes /** 7541a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes * Returns true if the scroll flags are compatible for 'collapsing' 7551a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes */ 756657ea1100fee4750f148f9d0dcb7e7e2028f105eAurimas Liutikas boolean isCollapsible() { 7571a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes return (mScrollFlags & SCROLL_FLAG_SCROLL) == SCROLL_FLAG_SCROLL 7581a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes && (mScrollFlags & COLLAPSIBLE_FLAGS) != 0; 7591a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 760a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 761a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 762a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 763a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * The default {@link Behavior} for {@link AppBarLayout}. Implements the necessary nested 764a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * scroll handling with offsetting. 765a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 766ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor public static class Behavior extends HeaderBehavior<AppBarLayout> { 76757aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes private static final int MAX_OFFSET_ANIMATION_DURATION = 600; // ms 768e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes private static final int INVALID_POSITION = -1; 769e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 77072a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes /** 77172a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes * Callback to allow control over any {@link AppBarLayout} dragging. 77272a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes */ 77372a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes public static abstract class DragCallback { 77472a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes /** 77572a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes * Allows control over whether the given {@link AppBarLayout} can be dragged or not. 77672a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes * 77772a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes * <p>Dragging is defined as a direct touch on the AppBarLayout with movement. This 77872a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes * call does not affect any nested scrolling.</p> 77972a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes * 78072a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes * @return true if we are in a position to scroll the AppBarLayout via a drag, false 78172a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes * if not. 78272a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes */ 78372a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes public abstract boolean canDrag(@NonNull AppBarLayout appBarLayout); 78472a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes } 78572a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes 786e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes private int mOffsetDelta; 787a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 78850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes private boolean mSkipNestedPreScroll; 78947543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes private boolean mWasNestedFlung; 790631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 791c530cc115fddab8e1d9645b322424dd45f9ecd0dKirill Grouchnikov private ValueAnimatorCompat mOffsetAnimator; 79250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 793e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes private int mOffsetToChildIndexOnLayout = INVALID_POSITION; 794e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes private boolean mOffsetToChildIndexOnLayoutIsMinHeight; 795e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes private float mOffsetToChildIndexOnLayoutPerc; 796e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 797d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes private WeakReference<View> mLastNestedScrollingChildRef; 79872a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes private DragCallback mOnDragCallback; 799d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 800a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public Behavior() {} 801a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 802a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public Behavior(Context context, AttributeSet attrs) { 803a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(context, attrs); 804a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 805a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 806a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 807ab809dd75ef2f73b312038f2c10473cfa5885a58Chris Banes public boolean onStartNestedScroll(CoordinatorLayout parent, AppBarLayout child, 808a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes View directTargetChild, View target, int nestedScrollAxes) { 809f57cd2fd5059c43d77bdfec57edfd5a217533103Chris Banes // Return true if we're nested scrolling vertically, and we have scrollable children 810f57cd2fd5059c43d77bdfec57edfd5a217533103Chris Banes // and the scrolling view is big enough to scroll 811631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes final boolean started = (nestedScrollAxes & ViewCompat.SCROLL_AXIS_VERTICAL) != 0 812f57cd2fd5059c43d77bdfec57edfd5a217533103Chris Banes && child.hasScrollableChildren() 813ab809dd75ef2f73b312038f2c10473cfa5885a58Chris Banes && parent.getHeight() - directTargetChild.getHeight() <= child.getHeight(); 814631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 815c530cc115fddab8e1d9645b322424dd45f9ecd0dKirill Grouchnikov if (started && mOffsetAnimator != null) { 816631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // Cancel any offset animation 817c530cc115fddab8e1d9645b322424dd45f9ecd0dKirill Grouchnikov mOffsetAnimator.cancel(); 818631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 819631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 820d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes // A new nested scroll has started so clear out the previous ref 821d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mLastNestedScrollingChildRef = null; 822d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 823631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes return started; 824a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 825a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 826a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 827a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, AppBarLayout child, 828a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes View target, int dx, int dy, int[] consumed) { 82950dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if (dy != 0 && !mSkipNestedPreScroll) { 83050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes int min, max; 83150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if (dy < 0) { 83250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // We're scrolling down 83350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes min = -child.getTotalScrollRange(); 83450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes max = min + child.getDownNestedPreScrollRange(); 83550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } else { 83650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // We're scrolling up 83750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes min = -child.getUpNestedPreScrollRange(); 83850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes max = 0; 83950dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 84050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes consumed[1] = scroll(coordinatorLayout, child, dy, min, max); 841a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 842a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 843a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 844a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 845a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public void onNestedScroll(CoordinatorLayout coordinatorLayout, AppBarLayout child, 846a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes View target, int dxConsumed, int dyConsumed, 847a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int dxUnconsumed, int dyUnconsumed) { 84850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if (dyUnconsumed < 0) { 84950dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // If the scrolling view is scrolling down but not consuming, it's probably be at 85050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // the top of it's content 85150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes scroll(coordinatorLayout, child, dyUnconsumed, 85250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes -child.getDownNestedScrollRange(), 0); 85350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // Set the expanding flag so that onNestedPreScroll doesn't handle any events 85450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes mSkipNestedPreScroll = true; 85550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } else { 85650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // As we're no longer handling nested scrolls, reset the skip flag 85750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes mSkipNestedPreScroll = false; 858a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 85950dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 860a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 86150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes @Override 862bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, AppBarLayout abl, 86350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes View target) { 86447543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes if (!mWasNestedFlung) { 865bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes // If we haven't been flung then let's see if the current view has been set to snap 866bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes snapToChildIfNeeded(coordinatorLayout, abl); 867bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes } 868bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes 869bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes // Reset the flags 87050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes mSkipNestedPreScroll = false; 87147543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes mWasNestedFlung = false; 872d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes // Keep a reference to the previous nested scrolling child 873d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mLastNestedScrollingChildRef = new WeakReference<>(target); 874d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 875d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 876d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes @Override 877631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public boolean onNestedFling(final CoordinatorLayout coordinatorLayout, 878631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes final AppBarLayout child, View target, float velocityX, float velocityY, 879631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes boolean consumed) { 880bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes boolean flung = false; 881bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes 882631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes if (!consumed) { 883631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // It has been consumed so let's fling ourselves 884bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes flung = fling(coordinatorLayout, child, -child.getTotalScrollRange(), 885bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes 0, -velocityY); 886631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } else { 887631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // If we're scrolling up and the child also consumed the fling. We'll fake scroll 888c9a859537b0871f84afeeb706a5b425fe3f2b4ddAurimas Liutikas // up to our 'collapsed' offset 889631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes if (velocityY < 0) { 890631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // We're scrolling down 891bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes final int targetScroll = -child.getTotalScrollRange() 892631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes + child.getDownNestedPreScrollRange(); 893bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes if (getTopBottomOffsetForScrollingSibling() < targetScroll) { 894bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes // If we're currently not expanded more than the target scroll, we'll 895bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes // animate a fling 89657aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes animateOffsetTo(coordinatorLayout, child, targetScroll, velocityY); 897bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes flung = true; 898631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 899631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } else { 900631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // We're scrolling up 901bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes final int targetScroll = -child.getUpNestedPreScrollRange(); 902bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes if (getTopBottomOffsetForScrollingSibling() > targetScroll) { 903bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes // If we're currently not expanded less than the target scroll, we'll 904bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes // animate a fling 90557aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes animateOffsetTo(coordinatorLayout, child, targetScroll, velocityY); 906bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes flung = true; 907631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 908631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 909631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 910631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 91147543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes mWasNestedFlung = flung; 912bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes return flung; 913631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 914631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 91572a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes /** 91672a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes * Set a callback to control any {@link AppBarLayout} dragging. 91772a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes * 91872a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes * @param callback the callback to use, or {@code null} to use the default behavior. 91972a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes */ 92072a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes public void setDragCallback(@Nullable DragCallback callback) { 92172a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes mOnDragCallback = callback; 92272a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes } 92372a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes 924631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes private void animateOffsetTo(final CoordinatorLayout coordinatorLayout, 92557aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes final AppBarLayout child, final int offset, float velocity) { 92657aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes final int distance = Math.abs(getTopBottomOffsetForScrollingSibling() - offset); 92757aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes 92857aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes final int duration; 92957aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes velocity = Math.abs(velocity); 93057aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes if (velocity > 0) { 93157aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes duration = 3 * Math.round(1000 * (distance / velocity)); 93257aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes } else { 93357aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes final float distanceRatio = (float) distance / child.getHeight(); 93457aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes duration = (int) ((distanceRatio + 1) * 150); 93557aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes } 93657aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes 93757aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes animateOffsetWithDuration(coordinatorLayout, child, offset, duration); 93857aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes } 93957aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes 94057aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes private void animateOffsetWithDuration(final CoordinatorLayout coordinatorLayout, 94157aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes final AppBarLayout child, final int offset, final int duration) { 942dcde7bf0c79a12f30d3853a82f4fbf54ce5161c8Chris Banes final int currentOffset = getTopBottomOffsetForScrollingSibling(); 943dcde7bf0c79a12f30d3853a82f4fbf54ce5161c8Chris Banes if (currentOffset == offset) { 944c530cc115fddab8e1d9645b322424dd45f9ecd0dKirill Grouchnikov if (mOffsetAnimator != null && mOffsetAnimator.isRunning()) { 945c530cc115fddab8e1d9645b322424dd45f9ecd0dKirill Grouchnikov mOffsetAnimator.cancel(); 946dcde7bf0c79a12f30d3853a82f4fbf54ce5161c8Chris Banes } 947dcde7bf0c79a12f30d3853a82f4fbf54ce5161c8Chris Banes return; 948dcde7bf0c79a12f30d3853a82f4fbf54ce5161c8Chris Banes } 949dcde7bf0c79a12f30d3853a82f4fbf54ce5161c8Chris Banes 950c530cc115fddab8e1d9645b322424dd45f9ecd0dKirill Grouchnikov if (mOffsetAnimator == null) { 951c530cc115fddab8e1d9645b322424dd45f9ecd0dKirill Grouchnikov mOffsetAnimator = ViewUtils.createAnimator(); 952c530cc115fddab8e1d9645b322424dd45f9ecd0dKirill Grouchnikov mOffsetAnimator.setInterpolator(AnimationUtils.DECELERATE_INTERPOLATOR); 9535a0083cc8328f05b15efe0293b7aa83723cdd9adChris Banes mOffsetAnimator.addUpdateListener(new ValueAnimatorCompat.AnimatorUpdateListener() { 954631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes @Override 955631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public void onAnimationUpdate(ValueAnimatorCompat animator) { 956ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor setHeaderTopBottomOffset(coordinatorLayout, child, 957631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes animator.getAnimatedIntValue()); 958631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 959631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes }); 960631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } else { 961c530cc115fddab8e1d9645b322424dd45f9ecd0dKirill Grouchnikov mOffsetAnimator.cancel(); 962631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 963631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 96457aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes mOffsetAnimator.setDuration(Math.min(duration, MAX_OFFSET_ANIMATION_DURATION)); 965c530cc115fddab8e1d9645b322424dd45f9ecd0dKirill Grouchnikov mOffsetAnimator.setIntValues(currentOffset, offset); 966c530cc115fddab8e1d9645b322424dd45f9ecd0dKirill Grouchnikov mOffsetAnimator.start(); 967631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 968631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 969108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes private int getChildIndexOnOffset(AppBarLayout abl, final int offset) { 970bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes for (int i = 0, count = abl.getChildCount(); i < count; i++) { 971bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes View child = abl.getChildAt(i); 972bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes if (child.getTop() <= -offset && child.getBottom() >= -offset) { 973108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes return i; 974bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes } 975bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes } 976108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes return -1; 977bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes } 978bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes 979bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes private void snapToChildIfNeeded(CoordinatorLayout coordinatorLayout, AppBarLayout abl) { 980bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes final int offset = getTopBottomOffsetForScrollingSibling(); 981108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes final int offsetChildIndex = getChildIndexOnOffset(abl, offset); 982108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes if (offsetChildIndex >= 0) { 983108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes final View offsetChild = abl.getChildAt(offsetChildIndex); 984bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes final LayoutParams lp = (LayoutParams) offsetChild.getLayoutParams(); 985108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes final int flags = lp.getScrollFlags(); 986108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes 987108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes if ((flags & LayoutParams.FLAG_SNAP) == LayoutParams.FLAG_SNAP) { 988bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes // We're set the snap, so animate the offset to the nearest edge 989108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes int snapTop = -offsetChild.getTop(); 990108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes int snapBottom = -offsetChild.getBottom(); 991108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes 992108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes if (offsetChildIndex == abl.getChildCount() - 1) { 993108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes // If this is the last child, we need to take the top inset into account 994108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes snapBottom += abl.getTopInset(); 995108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes } 996dcde7bf0c79a12f30d3853a82f4fbf54ce5161c8Chris Banes 997108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes if (checkFlag(flags, LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED)) { 998108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes // If the view is set only exit until it is collapsed, we'll abide by that 999108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes snapBottom += ViewCompat.getMinimumHeight(offsetChild); 1000108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes } else if (checkFlag(flags, LayoutParams.FLAG_QUICK_RETURN 1001108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes | LayoutParams.SCROLL_FLAG_ENTER_ALWAYS)) { 1002108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes // If it's set to always enter collapsed, it actually has two states. We 1003108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes // select the state and then snap within the state 1004108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes final int seam = snapBottom + ViewCompat.getMinimumHeight(offsetChild); 1005108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes if (offset < seam) { 1006108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes snapTop = seam; 1007108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes } else { 1008108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes snapBottom = seam; 1009108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes } 1010dcde7bf0c79a12f30d3853a82f4fbf54ce5161c8Chris Banes } 1011dcde7bf0c79a12f30d3853a82f4fbf54ce5161c8Chris Banes 1012108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes final int newOffset = offset < (snapBottom + snapTop) / 2 1013108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes ? snapBottom 1014108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes : snapTop; 1015bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes animateOffsetTo(coordinatorLayout, abl, 101657aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes MathUtils.constrain(newOffset, -abl.getTotalScrollRange(), 0), 0); 1017bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes } 1018bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes } 1019bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes } 1020bc22c4fd37e99643b3e7b87e2849a9e63fb8c5fcChris Banes 1021108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes private static boolean checkFlag(final int flags, final int check) { 1022108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes return (flags & check) == check; 1023108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes } 1024108a7a812404313b7b9f8daa154e657e49e0aae6Chris Banes 1025631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes @Override 1026bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes public boolean onMeasureChild(CoordinatorLayout parent, AppBarLayout child, 1027bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes int parentWidthMeasureSpec, int widthUsed, int parentHeightMeasureSpec, 1028bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes int heightUsed) { 1029bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes final CoordinatorLayout.LayoutParams lp = 1030bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes (CoordinatorLayout.LayoutParams) child.getLayoutParams(); 1031bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes if (lp.height == CoordinatorLayout.LayoutParams.WRAP_CONTENT) { 1032bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes // If the view is set to wrap on it's height, CoordinatorLayout by default will 1033bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes // cap the view at the CoL's height. Since the AppBarLayout can scroll, this isn't 1034bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes // what we actually want, so we measure it ourselves with an unspecified spec to 1035bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes // allow the child to be larger than it's parent 1036bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes parent.onMeasureChild(child, parentWidthMeasureSpec, widthUsed, 1037bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), heightUsed); 1038bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes return true; 1039bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes } 1040bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes 1041bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes // Let the parent handle it as normal 1042bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes return super.onMeasureChild(parent, child, parentWidthMeasureSpec, widthUsed, 1043bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes parentHeightMeasureSpec, heightUsed); 1044bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes } 1045bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes 1046bca7a517ce4fb75e2571ce2d9d0263fea8e15dbeChris Banes @Override 10479995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes public boolean onLayoutChild(CoordinatorLayout parent, AppBarLayout abl, 104850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes int layoutDirection) { 10499995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes boolean handled = super.onLayoutChild(parent, abl, layoutDirection); 10509995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes 10519995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes final int pendingAction = abl.getPendingAction(); 10529995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes if (pendingAction != PENDING_ACTION_NONE) { 10539995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes final boolean animate = (pendingAction & PENDING_ACTION_ANIMATE_ENABLED) != 0; 10549995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes if ((pendingAction & PENDING_ACTION_COLLAPSED) != 0) { 10559995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes final int offset = -abl.getUpNestedPreScrollRange(); 10569995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes if (animate) { 105757aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes animateOffsetTo(parent, abl, offset, 0); 10589995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } else { 1059ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor setHeaderTopBottomOffset(parent, abl, offset); 10609995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 10619995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } else if ((pendingAction & PENDING_ACTION_EXPANDED) != 0) { 10629995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes if (animate) { 106357aa00c058f3278fccc7a23f3cef29142bb14dbbChris Banes animateOffsetTo(parent, abl, 0, 0); 10649995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } else { 1065ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor setHeaderTopBottomOffset(parent, abl, 0); 10669995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 10679995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 10689995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } else if (mOffsetToChildIndexOnLayout >= 0) { 10699995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes View child = abl.getChildAt(mOffsetToChildIndexOnLayout); 1070e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes int offset = -child.getBottom(); 1071e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes if (mOffsetToChildIndexOnLayoutIsMinHeight) { 1072e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes offset += ViewCompat.getMinimumHeight(child); 1073e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } else { 1074e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes offset += Math.round(child.getHeight() * mOffsetToChildIndexOnLayoutPerc); 1075e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1076e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes setTopAndBottomOffset(offset); 1077e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 107850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 107979aa418487cdefb85d3c1fac32d6403a1ac6057dChris Banes // Finally reset any pending states 108079aa418487cdefb85d3c1fac32d6403a1ac6057dChris Banes abl.resetPendingAction(); 108179aa418487cdefb85d3c1fac32d6403a1ac6057dChris Banes mOffsetToChildIndexOnLayout = INVALID_POSITION; 108279aa418487cdefb85d3c1fac32d6403a1ac6057dChris Banes 108347543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes // We may have changed size, so let's constrain the top and bottom offset correctly, 108447543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes // just in case we're out of the bounds 108547543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes setTopAndBottomOffset( 108647543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes MathUtils.constrain(getTopAndBottomOffset(), -abl.getTotalScrollRange(), 0)); 108747543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes 1088df2d45b76203a9c4101629005eb27059d7f80297Chris Banes // Update the AppBarLayout's drawable state for any elevation changes. 1089df2d45b76203a9c4101629005eb27059d7f80297Chris Banes // This is needed so that the elevation is set in the first layout, so that 1090df2d45b76203a9c4101629005eb27059d7f80297Chris Banes // we don't get a visual elevation jump pre-N (due to the draw dispatch skip) 1091df2d45b76203a9c4101629005eb27059d7f80297Chris Banes updateAppBarLayoutDrawableState(parent, abl, getTopAndBottomOffset(), 0, true); 1092df2d45b76203a9c4101629005eb27059d7f80297Chris Banes 10931a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes // Make sure we dispatch the offset update 10941a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes abl.dispatchOffsetUpdates(getTopAndBottomOffset()); 109550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 109650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes return handled; 1097a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1098a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 109972a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes @Override 110072a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes boolean canDragView(AppBarLayout view) { 110172a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes if (mOnDragCallback != null) { 110272a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes // If there is a drag callback set, it's in control 110372a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes return mOnDragCallback.canDrag(view); 110472a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes } 110572a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes 110672a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes // Else we'll use the default behaviour of seeing if it can scroll down 1107d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes if (mLastNestedScrollingChildRef != null) { 110872a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes // If we have a reference to a scrolling view, check it 110972a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes final View scrollingView = mLastNestedScrollingChildRef.get(); 111072a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes return scrollingView != null && scrollingView.isShown() 111172a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes && !ViewCompat.canScrollVertically(scrollingView, -1); 111272a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes } else { 111372a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes // Otherwise we assume that the scrolling view hasn't been scrolled and can drag. 111472a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes return true; 1115d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 1116d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 1117d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 1118ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor @Override 111947543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes void onFlingFinished(CoordinatorLayout parent, AppBarLayout layout) { 112047543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes // At the end of a manual fling, check to see if we need to snap to the edge-child 112147543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes snapToChildIfNeeded(parent, layout); 112247543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes } 112347543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes 112447543aa43aacb8defbbf90682fcb2b63ce1b00b5Chris Banes @Override 112572a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes int getMaxDragOffset(AppBarLayout view) { 112672a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes return -view.getDownNestedScrollRange(); 112772a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes } 112872a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes 112972a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes @Override 113072a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes int getScrollRangeForDragFling(AppBarLayout view) { 113172a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes return view.getTotalScrollRange(); 113272a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes } 113372a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes 113472a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes @Override 113572a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes int setHeaderTopBottomOffset(CoordinatorLayout coordinatorLayout, 1136bb3740d273d4b5108ab63f6d264466250a197e5bChris Banes AppBarLayout appBarLayout, int newOffset, int minOffset, int maxOffset) { 1137e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes final int curOffset = getTopBottomOffsetForScrollingSibling(); 1138a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int consumed = 0; 1139a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 11405e7673e0dbd89512b525d1bde5c912eb07885550Chris Banes if (minOffset != 0 && curOffset >= minOffset && curOffset <= maxOffset) { 1141631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // If we have some scrolling range, and we're currently within the min and max 1142631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // offsets, calculate a new offset 114350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes newOffset = MathUtils.constrain(newOffset, minOffset, maxOffset); 1144a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (curOffset != newOffset) { 1145e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes final int interpolatedOffset = appBarLayout.hasChildWithInterpolator() 1146e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes ? interpolateOffset(appBarLayout, newOffset) 1147e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes : newOffset; 1148e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 11491a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes final boolean offsetChanged = setTopAndBottomOffset(interpolatedOffset); 1150631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 1151a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // Update how much dy we have consumed 1152a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes consumed = curOffset - newOffset; 1153a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // Update the stored sibling offset 1154e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes mOffsetDelta = newOffset - interpolatedOffset; 1155a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1156a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (!offsetChanged && appBarLayout.hasChildWithInterpolator()) { 1157a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // If the offset hasn't changed and we're using an interpolated scroll 1158a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // then we need to keep any dependent views updated. CoL will do this for 1159a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // us when we move, but we need to do it manually when we don't (as an 1160a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // interpolated scroll may finish early). 1161a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes coordinatorLayout.dispatchDependentViewsChanged(appBarLayout); 1162a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1163a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1164631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // Dispatch the updates to any listeners 11651a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes appBarLayout.dispatchOffsetUpdates(getTopAndBottomOffset()); 11661a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 11671a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes // Update the AppBarLayout's drawable state (for any elevation changes) 1168c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes updateAppBarLayoutDrawableState(coordinatorLayout, appBarLayout, newOffset, 1169df2d45b76203a9c4101629005eb27059d7f80297Chris Banes newOffset < curOffset ? -1 : 1, false); 1170a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 11715e7673e0dbd89512b525d1bde5c912eb07885550Chris Banes } else { 11725e7673e0dbd89512b525d1bde5c912eb07885550Chris Banes // Reset the offset delta 11735e7673e0dbd89512b525d1bde5c912eb07885550Chris Banes mOffsetDelta = 0; 1174a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1175a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1176a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return consumed; 1177a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1178a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1179bb3740d273d4b5108ab63f6d264466250a197e5bChris Banes @VisibleForTesting 1180bb3740d273d4b5108ab63f6d264466250a197e5bChris Banes boolean isOffsetAnimatorRunning() { 1181bb3740d273d4b5108ab63f6d264466250a197e5bChris Banes return mOffsetAnimator != null && mOffsetAnimator.isRunning(); 1182bb3740d273d4b5108ab63f6d264466250a197e5bChris Banes } 1183bb3740d273d4b5108ab63f6d264466250a197e5bChris Banes 1184a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes private int interpolateOffset(AppBarLayout layout, final int offset) { 1185a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int absOffset = Math.abs(offset); 1186a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1187a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes for (int i = 0, z = layout.getChildCount(); i < z; i++) { 1188a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final View child = layout.getChildAt(i); 1189a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final AppBarLayout.LayoutParams childLp = (LayoutParams) child.getLayoutParams(); 119050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes final Interpolator interpolator = childLp.getScrollInterpolator(); 1191a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 119250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if (absOffset >= child.getTop() && absOffset <= child.getBottom()) { 1193a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (interpolator != null) { 119450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes int childScrollableHeight = 0; 119550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes final int flags = childLp.getScrollFlags(); 119650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if ((flags & LayoutParams.SCROLL_FLAG_SCROLL) != 0) { 1197b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes // We're set to scroll so add the child's height plus margin 1198b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes childScrollableHeight += child.getHeight() + childLp.topMargin 1199b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes + childLp.bottomMargin; 1200b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes 120150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if ((flags & LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED) != 0) { 1202b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes // For a collapsing scroll, we to take the collapsed height 1203b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes // into account. 120450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes childScrollableHeight -= ViewCompat.getMinimumHeight(child); 120550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 120650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 120750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 1208ea004a01f44aaf36212120c936952c1742d03d30Chris Banes if (ViewCompat.getFitsSystemWindows(child)) { 1209ea004a01f44aaf36212120c936952c1742d03d30Chris Banes childScrollableHeight -= layout.getTopInset(); 1210ea004a01f44aaf36212120c936952c1742d03d30Chris Banes } 1211ea004a01f44aaf36212120c936952c1742d03d30Chris Banes 121250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if (childScrollableHeight > 0) { 121350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes final int offsetForView = absOffset - child.getTop(); 121450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes final int interpolatedDiff = Math.round(childScrollableHeight * 121550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes interpolator.getInterpolation( 121650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes offsetForView / (float) childScrollableHeight)); 121750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 121850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes return Integer.signum(offset) * (child.getTop() + interpolatedDiff); 121950dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 1220a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 122150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 122250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // If we get to here then the view on the offset isn't suitable for interpolated 122350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // scrolling. So break out of the loop 122450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes break; 1225a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1226a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1227a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1228a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return offset; 1229a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1230a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1231c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes private void updateAppBarLayoutDrawableState(final CoordinatorLayout parent, 1232df2d45b76203a9c4101629005eb27059d7f80297Chris Banes final AppBarLayout layout, final int offset, final int direction, 1233df2d45b76203a9c4101629005eb27059d7f80297Chris Banes final boolean forceJump) { 12341a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes final View child = getAppBarChildOnOffset(layout, offset); 12351a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes if (child != null) { 12361a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes final AppBarLayout.LayoutParams childLp = (LayoutParams) child.getLayoutParams(); 12371a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes final int flags = childLp.getScrollFlags(); 12381a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes boolean collapsed = false; 12391a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 12401a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes if ((flags & LayoutParams.SCROLL_FLAG_SCROLL) != 0) { 12411a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes final int minHeight = ViewCompat.getMinimumHeight(child); 12421a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 12431a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes if (direction > 0 && (flags & (LayoutParams.SCROLL_FLAG_ENTER_ALWAYS 12441a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes | LayoutParams.SCROLL_FLAG_ENTER_ALWAYS_COLLAPSED)) != 0) { 12451a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes // We're set to enter always collapsed so we are only collapsed when 12461a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes // being scrolled down, and in a collapsed offset 12471a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes collapsed = -offset >= child.getBottom() - minHeight - layout.getTopInset(); 12481a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } else if ((flags & LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED) != 0) { 12491a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes // We're set to exit until collapsed, so any offset which results in 12501a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes // the minimum height (or less) being shown is collapsed 12511a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes collapsed = -offset >= child.getBottom() - minHeight - layout.getTopInset(); 12521a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 12531a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 12541a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 1255c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes final boolean changed = layout.setCollapsedState(collapsed); 1256c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes 1257df2d45b76203a9c4101629005eb27059d7f80297Chris Banes if (Build.VERSION.SDK_INT >= 11 && (forceJump 1258df2d45b76203a9c4101629005eb27059d7f80297Chris Banes || (changed && shouldJumpElevationState(parent, layout)))) { 1259c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes // If the collapsed state changed, we may need to 1260c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes // jump to the current state if we have an overlapping view 1261c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes layout.jumpDrawablesToCurrentState(); 1262c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes } 1263c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes } 1264c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes } 1265c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes 1266c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes private boolean shouldJumpElevationState(CoordinatorLayout parent, AppBarLayout layout) { 1267c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes // We should jump the elevated state if we have a dependent scrolling view which has 1268c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes // an overlapping top (i.e. overlaps us) 1269c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes final List<View> dependencies = parent.getDependents(layout); 1270c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes for (int i = 0, size = dependencies.size(); i < size; i++) { 1271c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes final View dependency = dependencies.get(i); 1272c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes final CoordinatorLayout.LayoutParams lp = 1273c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes (CoordinatorLayout.LayoutParams) dependency.getLayoutParams(); 1274c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes final CoordinatorLayout.Behavior behavior = lp.getBehavior(); 1275c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes 1276c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes if (behavior instanceof ScrollingViewBehavior) { 1277c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes return ((ScrollingViewBehavior) behavior).getOverlayTop() != 0; 1278c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes } 12791a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 1280c07c8e1e74a026c0d9e3a9dd119913436380be38Chris Banes return false; 12811a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 12821a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 12831a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes private static View getAppBarChildOnOffset(final AppBarLayout layout, final int offset) { 12841a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes final int absOffset = Math.abs(offset); 12851a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes for (int i = 0, z = layout.getChildCount(); i < z; i++) { 12861a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes final View child = layout.getChildAt(i); 12871a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes if (absOffset >= child.getTop() && absOffset <= child.getBottom()) { 12881a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes return child; 12891a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 12901a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 12911a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes return null; 12921a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes } 12931a8e4886abbc35e479cddb7b4acd601cede2fd8aChris Banes 1294ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor @Override 129572a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes int getTopBottomOffsetForScrollingSibling() { 1296e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes return getTopAndBottomOffset() + mOffsetDelta; 1297e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1298e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1299e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes @Override 1300824644fc70d5fd36bcd4c1e155c1279aebcac007Chris Banes public Parcelable onSaveInstanceState(CoordinatorLayout parent, AppBarLayout abl) { 1301824644fc70d5fd36bcd4c1e155c1279aebcac007Chris Banes final Parcelable superState = super.onSaveInstanceState(parent, abl); 1302e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes final int offset = getTopAndBottomOffset(); 1303e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1304e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes // Try and find the first visible child... 1305824644fc70d5fd36bcd4c1e155c1279aebcac007Chris Banes for (int i = 0, count = abl.getChildCount(); i < count; i++) { 1306824644fc70d5fd36bcd4c1e155c1279aebcac007Chris Banes View child = abl.getChildAt(i); 1307e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes final int visBottom = child.getBottom() + offset; 1308e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1309e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes if (child.getTop() + offset <= 0 && visBottom >= 0) { 1310e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes final SavedState ss = new SavedState(superState); 1311e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes ss.firstVisibleChildIndex = i; 1312c9a859537b0871f84afeeb706a5b425fe3f2b4ddAurimas Liutikas ss.firstVisibleChildAtMinimumHeight = 1313824644fc70d5fd36bcd4c1e155c1279aebcac007Chris Banes visBottom == (ViewCompat.getMinimumHeight(child) + abl.getTopInset()); 1314c9a859537b0871f84afeeb706a5b425fe3f2b4ddAurimas Liutikas ss.firstVisibleChildPercentageShown = visBottom / (float) child.getHeight(); 1315e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes return ss; 1316e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1317e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1318e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1319e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes // Else we'll just return the super state 1320e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes return superState; 1321e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1322e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1323e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes @Override 1324e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes public void onRestoreInstanceState(CoordinatorLayout parent, AppBarLayout appBarLayout, 1325e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes Parcelable state) { 1326e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes if (state instanceof SavedState) { 1327e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes final SavedState ss = (SavedState) state; 1328e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes super.onRestoreInstanceState(parent, appBarLayout, ss.getSuperState()); 1329e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes mOffsetToChildIndexOnLayout = ss.firstVisibleChildIndex; 1330c9a859537b0871f84afeeb706a5b425fe3f2b4ddAurimas Liutikas mOffsetToChildIndexOnLayoutPerc = ss.firstVisibleChildPercentageShown; 1331c9a859537b0871f84afeeb706a5b425fe3f2b4ddAurimas Liutikas mOffsetToChildIndexOnLayoutIsMinHeight = ss.firstVisibleChildAtMinimumHeight; 1332e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } else { 1333e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes super.onRestoreInstanceState(parent, appBarLayout, state); 1334e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes mOffsetToChildIndexOnLayout = INVALID_POSITION; 1335e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1336e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1337e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 133805f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes protected static class SavedState extends AbsSavedState { 1339e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes int firstVisibleChildIndex; 1340c9a859537b0871f84afeeb706a5b425fe3f2b4ddAurimas Liutikas float firstVisibleChildPercentageShown; 1341c9a859537b0871f84afeeb706a5b425fe3f2b4ddAurimas Liutikas boolean firstVisibleChildAtMinimumHeight; 1342e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 134362ab25d71ccfa775a8bd2add7b41277bc4e14bbcChris Banes public SavedState(Parcel source, ClassLoader loader) { 134405f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes super(source, loader); 1345e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes firstVisibleChildIndex = source.readInt(); 1346c9a859537b0871f84afeeb706a5b425fe3f2b4ddAurimas Liutikas firstVisibleChildPercentageShown = source.readFloat(); 1347c9a859537b0871f84afeeb706a5b425fe3f2b4ddAurimas Liutikas firstVisibleChildAtMinimumHeight = source.readByte() != 0; 1348e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1349e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1350e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes public SavedState(Parcelable superState) { 1351e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes super(superState); 1352e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1353e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1354e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes @Override 1355e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes public void writeToParcel(Parcel dest, int flags) { 1356e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes super.writeToParcel(dest, flags); 1357e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes dest.writeInt(firstVisibleChildIndex); 1358c9a859537b0871f84afeeb706a5b425fe3f2b4ddAurimas Liutikas dest.writeFloat(firstVisibleChildPercentageShown); 1359c9a859537b0871f84afeeb706a5b425fe3f2b4ddAurimas Liutikas dest.writeByte((byte) (firstVisibleChildAtMinimumHeight ? 1 : 0)); 1360e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1361e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1362e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes public static final Parcelable.Creator<SavedState> CREATOR = 136362ab25d71ccfa775a8bd2add7b41277bc4e14bbcChris Banes ParcelableCompat.newCreator(new ParcelableCompatCreatorCallbacks<SavedState>() { 1364e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes @Override 136562ab25d71ccfa775a8bd2add7b41277bc4e14bbcChris Banes public SavedState createFromParcel(Parcel source, ClassLoader loader) { 136662ab25d71ccfa775a8bd2add7b41277bc4e14bbcChris Banes return new SavedState(source, loader); 1367e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1368e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1369e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes @Override 1370e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes public SavedState[] newArray(int size) { 1371e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes return new SavedState[size]; 1372e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 137362ab25d71ccfa775a8bd2add7b41277bc4e14bbcChris Banes }); 1374a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1375a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1376a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1377a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 1378a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Behavior which should be used by {@link View}s which can scroll vertically and support 1379a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * nested scrolling to automatically scroll any {@link AppBarLayout} siblings. 1380a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 1381ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor public static class ScrollingViewBehavior extends HeaderScrollingViewBehavior { 1382a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1383a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public ScrollingViewBehavior() {} 1384a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1385a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public ScrollingViewBehavior(Context context, AttributeSet attrs) { 1386a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(context, attrs); 1387a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1388b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes final TypedArray a = context.obtainStyledAttributes(attrs, 138973e7a06fb66110495fa4e98a91831a47feab2526Chris Banes R.styleable.ScrollingViewBehavior_Layout); 1390b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes setOverlayTop(a.getDimensionPixelSize( 139173e7a06fb66110495fa4e98a91831a47feab2526Chris Banes R.styleable.ScrollingViewBehavior_Layout_behavior_overlapTop, 0)); 1392a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes a.recycle(); 1393a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1394a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1395a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 1396a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public boolean layoutDependsOn(CoordinatorLayout parent, View child, View dependency) { 1397a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // We depend on any AppBarLayouts 1398a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return dependency instanceof AppBarLayout; 1399a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1400a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1401a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 1402a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public boolean onDependentViewChanged(CoordinatorLayout parent, View child, 1403a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes View dependency) { 14045e7673e0dbd89512b525d1bde5c912eb07885550Chris Banes offsetChildAsNeeded(parent, child, dependency); 14050d2f46331a9fc3b21597e926ba2e061af7c00708Chris Banes return false; 14060d2f46331a9fc3b21597e926ba2e061af7c00708Chris Banes } 14070d2f46331a9fc3b21597e926ba2e061af7c00708Chris Banes 140800a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes @Override 14094cf1d92509224fab3ca69b419a005c536ab75c5cChris Banes public boolean onRequestChildRectangleOnScreen(CoordinatorLayout parent, View child, 141000a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes Rect rectangle, boolean immediate) { 141100a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes final AppBarLayout header = findFirstDependency(parent.getDependencies(child)); 141200a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes if (header != null) { 141300a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes // Offset the rect by the child's left/top 141400a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes rectangle.offset(child.getLeft(), child.getTop()); 141500a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes 141600a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes final Rect parentRect = mTempRect1; 141700a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes parentRect.set(0, 0, parent.getWidth(), parent.getHeight()); 141800a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes 141900a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes if (!parentRect.contains(rectangle)) { 142000a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes // If the rectangle can not be fully seen the visible bounds, collapse 142100a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes // the AppBarLayout 142200a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes header.setExpanded(false, !immediate); 142300a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes return true; 142400a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes } 142500a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes } 142600a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes return false; 142700a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes } 142800a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes 14295e7673e0dbd89512b525d1bde5c912eb07885550Chris Banes private void offsetChildAsNeeded(CoordinatorLayout parent, View child, View dependency) { 1430a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final CoordinatorLayout.Behavior behavior = 1431a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes ((CoordinatorLayout.LayoutParams) dependency.getLayoutParams()).getBehavior(); 1432a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (behavior instanceof Behavior) { 14335e7673e0dbd89512b525d1bde5c912eb07885550Chris Banes // Offset the child, pinning it to the bottom the header-dependency, maintaining 1434bb3740d273d4b5108ab63f6d264466250a197e5bChris Banes // any vertical gap and overlap 14355e7673e0dbd89512b525d1bde5c912eb07885550Chris Banes final Behavior ablBehavior = (Behavior) behavior; 1436318baf84dade07174d71e10322e3b10ab4b0c28cChris Banes ViewCompat.offsetTopAndBottom(child, (dependency.getBottom() - child.getTop()) 14375e7673e0dbd89512b525d1bde5c912eb07885550Chris Banes + ablBehavior.mOffsetDelta 14385e7673e0dbd89512b525d1bde5c912eb07885550Chris Banes + getVerticalLayoutGap() 1439b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes - getOverlapPixelsForOffset(dependency)); 1440ea004a01f44aaf36212120c936952c1742d03d30Chris Banes } 1441ea004a01f44aaf36212120c936952c1742d03d30Chris Banes } 1442ea004a01f44aaf36212120c936952c1742d03d30Chris Banes 1443b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes @Override 1444b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes float getOverlapRatioForOffset(final View header) { 1445b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes if (header instanceof AppBarLayout) { 1446b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes final AppBarLayout abl = (AppBarLayout) header; 1447ea004a01f44aaf36212120c936952c1742d03d30Chris Banes final int totalScrollRange = abl.getTotalScrollRange(); 1448ea004a01f44aaf36212120c936952c1742d03d30Chris Banes final int preScrollDown = abl.getDownNestedPreScrollRange(); 1449b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes final int offset = getAppBarLayoutOffset(abl); 1450a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1451ea004a01f44aaf36212120c936952c1742d03d30Chris Banes if (preScrollDown != 0 && (totalScrollRange + offset) <= preScrollDown) { 1452ea004a01f44aaf36212120c936952c1742d03d30Chris Banes // If we're in a pre-scroll down. Don't use the offset at all. 1453ea004a01f44aaf36212120c936952c1742d03d30Chris Banes return 0; 1454a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } else { 1455ea004a01f44aaf36212120c936952c1742d03d30Chris Banes final int availScrollRange = totalScrollRange - preScrollDown; 1456dfb857dd12b359c0bdae11a23e039f286d54dc0aChris Banes if (availScrollRange != 0) { 1457ea004a01f44aaf36212120c936952c1742d03d30Chris Banes // Else we'll use a interpolated ratio of the overlap, depending on offset 1458b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes return 1f + (offset / (float) availScrollRange); 1459ea004a01f44aaf36212120c936952c1742d03d30Chris Banes } 1460a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1461a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1462b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes return 0f; 1463a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1464a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1465b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes private static int getAppBarLayoutOffset(AppBarLayout abl) { 1466b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes final CoordinatorLayout.Behavior behavior = 1467b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes ((CoordinatorLayout.LayoutParams) abl.getLayoutParams()).getBehavior(); 1468b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes if (behavior instanceof Behavior) { 1469b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes return ((Behavior) behavior).getTopBottomOffsetForScrollingSibling(); 1470b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes } 1471b2f568c9c71763ed823b1f9c274077825b5d0c9eChris Banes return 0; 1472a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1473a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1474ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor @Override 147500a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes AppBarLayout findFirstDependency(List<View> views) { 1476a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes for (int i = 0, z = views.size(); i < z; i++) { 1477a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes View view = views.get(i); 1478a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (view instanceof AppBarLayout) { 147900a00a7d3ba8279294f63994473afc32e05dcf10Chris Banes return (AppBarLayout) view; 1480a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1481a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1482a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return null; 1483a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1484ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor 1485ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor @Override 148672a0913607198c5ce3fa351242ccbdfb3b93f178Chris Banes int getScrollRange(View v) { 1487ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor if (v instanceof AppBarLayout) { 1488ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor return ((AppBarLayout) v).getTotalScrollRange(); 1489ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor } else { 1490ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor return super.getScrollRange(v); 1491ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor } 1492ec161ac1da9c8ca0e942b01e037ceb1cc51a2f3cMady Mellor } 1493a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1494a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes} 1495